Collapse optmize material to item

[Max Daiber]

Hi,

Is there a way to collapse the color corrections?

Let me explain. I use the color correction menu to quickly change the tones of leafs, because it really faster when trees have multiple materials. I do this with each species indivudually (1 species = 1 forest).

What I would like to do, is to combine those forest objects into 1 after ajusting all tones.

Thanks